1 /* Some code common to C++ and ObjC++ front ends.
2 Copyright (C) 2004, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Ziemowit Laski <zlaski@apple.com>
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
28 #include "c-family/c-common.h"
29 #include "langhooks.h"
30 #include "langhooks-def.h"
31 #include "diagnostic.h"
33 #include "cxx-pretty-print.h"
34 #include "cp-objcp-common.h"
36 /* Special routine to get the alias set for C++. */
39 cxx_get_alias_set (tree t)
41 if (IS_FAKE_BASE_TYPE (t))
42 /* The base variant of a type must be in the same alias set as the
44 return get_alias_set (TYPE_CONTEXT (t));
46 /* Punt on PMFs until we canonicalize functions properly. */
47 if (TYPE_PTRMEMFUNC_P (t)
48 || (POINTER_TYPE_P (t)
49 && TYPE_PTRMEMFUNC_P (TREE_TYPE (t))))
52 return c_common_get_alias_set (t);
55 /* Called from check_global_declarations. */
58 cxx_warn_unused_global_decl (const_tree decl)
60 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
62 if (DECL_IN_SYSTEM_HEADER (decl))
65 /* Const variables take the place of #defines in C++. */
66 if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
72 /* Langhook for tree_size: determine size of our 'x' and 'c' nodes. */
74 cp_tree_size (enum tree_code code)
78 case PTRMEM_CST: return sizeof (struct ptrmem_cst);
79 case BASELINK: return sizeof (struct tree_baselink);
80 case TEMPLATE_PARM_INDEX: return sizeof (template_parm_index);
81 case DEFAULT_ARG: return sizeof (struct tree_default_arg);
82 case OVERLOAD: return sizeof (struct tree_overload);
83 case STATIC_ASSERT: return sizeof (struct tree_static_assert);
84 case TYPE_ARGUMENT_PACK:
85 case TYPE_PACK_EXPANSION:
86 return sizeof (struct tree_common);
88 case NONTYPE_ARGUMENT_PACK:
89 case EXPR_PACK_EXPANSION:
90 return sizeof (struct tree_exp);
92 case ARGUMENT_PACK_SELECT:
93 return sizeof (struct tree_argument_pack_select);
96 return sizeof (struct tree_trait_expr);
98 case LAMBDA_EXPR: return sizeof (struct tree_lambda_expr);
100 case TEMPLATE_INFO: return sizeof (struct tree_template_info);
108 /* Returns true if T is a variably modified type, in the sense of C99.
109 FN is as passed to variably_modified_p.
110 This routine needs only check cases that cannot be handled by the
111 language-independent logic in tree.c. */
114 cp_var_mod_type_p (tree type, tree fn)
116 /* If TYPE is a pointer-to-member, it is variably modified if either
117 the class or the member are variably modified. */
118 if (TYPE_PTR_TO_MEMBER_P (type))
119 return (variably_modified_type_p (TYPE_PTRMEM_CLASS_TYPE (type), fn)
120 || variably_modified_type_p (TYPE_PTRMEM_POINTED_TO_TYPE (type),
123 /* All other types are not variably modified. */
127 /* Construct a C++-aware pretty-printer for CONTEXT. It is assumed
128 that CONTEXT->printer is an already constructed basic pretty_printer. */
130 cxx_initialize_diagnostics (diagnostic_context *context)
132 pretty_printer *base;
133 cxx_pretty_printer *pp;
135 c_common_initialize_diagnostics (context);
137 base = context->printer;
138 pp = XNEW (cxx_pretty_printer);
139 memcpy (pp_base (pp), base, sizeof (pretty_printer));
140 pp_cxx_pretty_printer_init (pp);
141 context->printer = (pretty_printer *) pp;
143 /* It is safe to free this object because it was previously malloc()'d. */
147 /* This compares two types for equivalence ("compatible" in C-based languages).
148 This routine should only return 1 if it is sure. It should not be used
149 in contexts where erroneously returning 0 causes problems. */
152 cxx_types_compatible_p (tree x, tree y)
154 return same_type_ignoring_top_level_qualifiers_p (x, y);
157 /* Return true if DECL is explicit member function. */
160 cp_function_decl_explicit_p (tree decl)
163 && FUNCTION_FIRST_USER_PARMTYPE (decl) != void_list_node
164 && DECL_LANG_SPECIFIC (STRIP_TEMPLATE (decl))
165 && DECL_NONCONVERTING_P (decl));
168 /* Stubs to keep c-opts.c happy. */
170 push_file_scope (void)
175 pop_file_scope (void)
179 /* c-pragma.c needs to query whether a decl has extern "C" linkage. */
181 has_c_linkage (const_tree decl)
183 return DECL_EXTERN_C_P (decl);
186 static GTY ((if_marked ("tree_decl_map_marked_p"), param_is (struct tree_decl_map)))
187 htab_t shadowed_var_for_decl;
189 /* Lookup a shadowed var for FROM, and return it if we find one. */
192 decl_shadowed_for_var_lookup (tree from)
194 struct tree_decl_map *h, in;
197 h = (struct tree_decl_map *)
198 htab_find_with_hash (shadowed_var_for_decl, &in, DECL_UID (from));
204 /* Insert a mapping FROM->TO in the shadowed var hashtable. */
207 decl_shadowed_for_var_insert (tree from, tree to)
209 struct tree_decl_map *h;
212 h = ggc_alloc_tree_decl_map ();
215 loc = htab_find_slot_with_hash (shadowed_var_for_decl, h, DECL_UID (from),
217 *(struct tree_decl_map **) loc = h;
221 init_shadowed_var_for_decl (void)
223 shadowed_var_for_decl = htab_create_ggc (512, tree_decl_map_hash,
224 tree_decl_map_eq, 0);
228 cp_common_init_ts (void)
230 MARK_TS_DECL_NON_COMMON (NAMESPACE_DECL);
231 MARK_TS_DECL_NON_COMMON (USING_DECL);
232 MARK_TS_DECL_NON_COMMON (TEMPLATE_DECL);
234 MARK_TS_COMMON (TEMPLATE_TEMPLATE_PARM);
235 MARK_TS_COMMON (TEMPLATE_TYPE_PARM);
236 MARK_TS_COMMON (TEMPLATE_PARM_INDEX);
237 MARK_TS_COMMON (OVERLOAD);
238 MARK_TS_COMMON (TEMPLATE_INFO);
239 MARK_TS_COMMON (TYPENAME_TYPE);
240 MARK_TS_COMMON (TYPEOF_TYPE);
241 MARK_TS_COMMON (UNDERLYING_TYPE);
242 MARK_TS_COMMON (BASELINK);
243 MARK_TS_COMMON (TYPE_PACK_EXPANSION);
244 MARK_TS_COMMON (TYPE_ARGUMENT_PACK);
245 MARK_TS_COMMON (DECLTYPE_TYPE);
246 MARK_TS_COMMON (BOUND_TEMPLATE_TEMPLATE_PARM);
247 MARK_TS_COMMON (UNBOUND_CLASS_TEMPLATE);
249 MARK_TS_TYPED (EXPR_PACK_EXPANSION);
250 MARK_TS_TYPED (SWITCH_STMT);
251 MARK_TS_TYPED (IF_STMT);
252 MARK_TS_TYPED (FOR_STMT);
253 MARK_TS_TYPED (RANGE_FOR_STMT);
254 MARK_TS_TYPED (AGGR_INIT_EXPR);
255 MARK_TS_TYPED (EXPR_STMT);
256 MARK_TS_TYPED (EH_SPEC_BLOCK);
257 MARK_TS_TYPED (CLEANUP_STMT);
258 MARK_TS_TYPED (SCOPE_REF);
259 MARK_TS_TYPED (CAST_EXPR);
260 MARK_TS_TYPED (NON_DEPENDENT_EXPR);
261 MARK_TS_TYPED (MODOP_EXPR);
262 MARK_TS_TYPED (TRY_BLOCK);
263 MARK_TS_TYPED (THROW_EXPR);
264 MARK_TS_TYPED (HANDLER);
265 MARK_TS_TYPED (REINTERPRET_CAST_EXPR);
266 MARK_TS_TYPED (CONST_CAST_EXPR);
267 MARK_TS_TYPED (STATIC_CAST_EXPR);
268 MARK_TS_TYPED (DYNAMIC_CAST_EXPR);
269 MARK_TS_TYPED (TEMPLATE_ID_EXPR);
270 MARK_TS_TYPED (ARROW_EXPR);
271 MARK_TS_TYPED (SIZEOF_EXPR);
272 MARK_TS_TYPED (ALIGNOF_EXPR);
273 MARK_TS_TYPED (AT_ENCODE_EXPR);
274 MARK_TS_TYPED (UNARY_PLUS_EXPR);
275 MARK_TS_TYPED (TRAIT_EXPR);
276 MARK_TS_TYPED (TYPE_ARGUMENT_PACK);
277 MARK_TS_TYPED (NOEXCEPT_EXPR);
278 MARK_TS_TYPED (NONTYPE_ARGUMENT_PACK);
279 MARK_TS_TYPED (WHILE_STMT);
280 MARK_TS_TYPED (NEW_EXPR);
281 MARK_TS_TYPED (VEC_NEW_EXPR);
282 MARK_TS_TYPED (BREAK_STMT);
283 MARK_TS_TYPED (MEMBER_REF);
284 MARK_TS_TYPED (DOTSTAR_EXPR);
285 MARK_TS_TYPED (DO_STMT);
286 MARK_TS_TYPED (DELETE_EXPR);
287 MARK_TS_TYPED (VEC_DELETE_EXPR);
288 MARK_TS_TYPED (CONTINUE_STMT);
289 MARK_TS_TYPED (TAG_DEFN);
290 MARK_TS_TYPED (PSEUDO_DTOR_EXPR);
291 MARK_TS_TYPED (TYPEID_EXPR);
292 MARK_TS_TYPED (MUST_NOT_THROW_EXPR);
293 MARK_TS_TYPED (STMT_EXPR);
294 MARK_TS_TYPED (OFFSET_REF);
295 MARK_TS_TYPED (OFFSETOF_EXPR);
296 MARK_TS_TYPED (PTRMEM_CST);
297 MARK_TS_TYPED (EMPTY_CLASS_EXPR);
298 MARK_TS_TYPED (VEC_INIT_EXPR);
299 MARK_TS_TYPED (USING_STMT);
300 MARK_TS_TYPED (LAMBDA_EXPR);
301 MARK_TS_TYPED (CTOR_INITIALIZER);
304 #include "gt-cp-cp-objcp-common.h"